Governor provided with an auxiliary force



' Feb. 2, 1932. l c. A. HARTUNG ET AL. 1,843,815

GOVERNOR PROVIDED WITH AN AUXILIARY FORCE Filed Aug. 29,. 1929 Patented Feb. 2, 1932 CARL A. HART'UNG- AND ERICH OF BERLIN, GERMANY y GOVERN'GR'PROVIDED WITH AN 'UXILIARY FORCE Application led .august `29, 1929, Serial No. 389,293, and in Gerniany May 14, 1928. i

It has before been known to control gov-l ernors in such av manner that the impulse issuing from any sultable device 1s mcreased by an auxiliary force. In all of these known` 5 methods and devices the impulse/,for the regulation must issue from asender which not only requires some power for itsv adjustment but which also consumes power for the control of the auxiliary force, that is tosay, for

intensifying the initial impulse. Thus/the f forces, sometimes very Weak, which are available for conducting the controlling process are additionally strained and in this respect even electric adjusting and controlling devices form no exception.

The new process described hereinafter l works without the power consuming governor of the servo-motor coming into action. The' device in connection with which the control is carried out can be 'started by the release of the governing process described below without causing any additional strain. l

It is perfectly free to move and is affected only by the resistances which are common to the instrument in question. Thus in the casev of a galyanometer the hand can swing out `without any friction caused by making a contact and in the case of a. gas'or steam meter, the meter itself follows the slightest measuring pressure and can be moved'by the sender without any additional strain frictional resistances) This result is obtained by the adjustment of the instrument effecting the impulse at regular shorter or longer intervals and after a previous automatic brief locking' .of the measuring tool being tested, by means of one or several automatically moved feelers, whereupon by means of these feelers the actual'governing element with the auxiliary force applied is adjusted accordingly. Thereupon the controlling element is held in its position until the next and new adjust-A ment by the feelers takes place. Thus the control is effected periodically. The inter- Avals between the controls may however be made extremely short so that it 4suffices for most practical conditions and in effect corresponds to a. continual control. The new 5 construction may however be used with 'special advantage for impulse-senders which Vthemselves work periodically, 'for instance automatic gas testing apparatus. In such a case by altering the apparatus accordingly 1t is only necesssary to be certain that, each 55.

time, the terminationof the analysis coin-` /or moved by any kind of a measuring instrument, for instance by a pressure gauge, steam, gas-meter or the like. The disc a ,05, carries a pin Z). At the side of the disc a the disc c is mounted, the spindle of`which is in line with that of the disc a. Thedisc c is provided on both sides With the abutments and e. The disc is given a'turning 7n moment Aby means of weights f suspended from the ends of a thread placed around the circumference of the disc. On the other hand' the pin gy mounted on the side of the disc c engages with a rod L which is movedas may be easily understood-by the cam disc z' on the shaft 7c when the latter is rotating. At the side of the disc c a third disc l is placed, the axis of which is in line with the axes of the other 4two discs. 80

yAlso the disc Z is provided with an abutment 'm vand is connected to a registering device which imparts to it aJcertain turning moment. Above the disc a ,a brake `0 and above the disc Z a similar brake p' are ar- 5 ranged controlled by the cam discs q and r. Both cam discs are mounted on the same shaft 7c as the cam The mode of operation of this apparatus is as follows :f-

The disc a is moved by any suitable device, for instance by means of a pressure gauge as villustrated upon the drawing. The recording should follow the changing indications. The recording device maybe replaced by a sender or by the controlling element of any regulator. The shaft c is uniformly rotated by clock work or by a motor. The cam disc (1 will then from time to time release thebrake o, whereby the disc a will W' be held in its yposition forja short moment.

Then the cam disc i against which the rod sufficiently great for holdingthe disc in'itsv 7L contacts, releases the disc c and the latter is pulled around by the weight f until the abutment al comes into contact with the pin b. In this position the disc c is held stationary. The weight f must naturally be position even at a later stage when it is acted upon bythe impulses of the controlling processes. The weight f may: however be lreplaced by a spring or another kind of force. Now the cam disc r lifts the brake. p olf the disc Z and the latter is pulled around by the weight of the recording device until the pin m rests upon the detent e. If the disc c, while the cam disc i permits free movement of the disc, cannot turn sufficiently far for d to come into contact with b, as c has already previously struck against m,

`the weight f will then pull simultaneously the discs c and vZ into their correct positions,

- until d strikes b after the brake p has been lifted. Y

Upon a further rotation ofthe shaft 7c, in the irst instance the brake p is again placed uponll and the latter is held in this posi# tion. By the cam disc v1 the roller on c is forced into a lower position with the aid of ythe rod h, that is to say d is removed from Zi and at the same `time the weightf is raised. Finally thev cam disc (j lifts again i change.-

the brake o and the disc a can freely adjust itself. In this manner the cycle of opera-- tions repeats itself.

- It goes Without saying that the disc c can he replaced by two discs whichV move in opposite directions. The disc c may also be replaced by a suitably mounted feeler and both discs made alike. The principle of the method is not affected at all by such a instrum e\\controlling the impulses or that the/primary measuring apparatus may be so coupled with the shafty 7o that the holding of Jthe disc a by the cam disc g always occ urs 'at the'right moment.

We claim as our invention 1 a recorder, a member which is moved in response to variations in thel influence vto ,be recorded, means for periodically arresting themovem'entvof said member, mechanical feelers, means to movef said feelers to engage said member 'when in arrested condition, and means for recording the. position of said feelers at the time of engagement with saidmember, said feelers being operated by an auxiliary source ofl power.

2. In a recorder, a member movable in response to variations in theinfluen'ce to be recorded, means for periodically braking said member, mechanical feeling means, said 'feeling means being capable of being moved by potential energy to engage said member, re-

member, mechanical feeling means, said feeling means being capable of being moved by 4potential energy to engage said member, re- -cording mechanism operated by said feeler means, .means for periodically braking said recording means, means for controlling both said braking meansv simultaneously to operate said first braking means and to release said second braking means, and means operable by an auxiliary source of power for storing up the potential energy and to return said feeling means to inoperative position.`

In testimony whereof we have atli-Xed our signatures.

CARL A. HARTUNG. ERICH WALTER.4

ios

It will also be evident that the M mpvements of the shaft k can be caused to vtake place independently of the measuring 

